A Prospective Analysis of In a nutshell Analog Audio Recording with - - PDF document

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A Prospective Analysis of In a nutshell Analog Audio Recording with - - PDF document

A Prospective Analysis of In a nutshell Analog Audio Recording with To access an analog synthesizer online, for high-quality recording Web Servers With batched access, it optimizes user and system time Lucas Zawacki A prototype


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1 Lucas Zawacki Marcelo Johann

A Prospective Analysis of Analog Audio Recording with Web Servers

The Third Workshop on Ubiquitous Music: Ubiquitous and Mobile Computing for Education and Creative Industries

III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 2

In a nutshell…

  • To access an analog synthesizer online, for

high-quality recording

  • With batched access, it optimizes user and

system time

  • A prototype is running, a paper under review
  • That leads to ubiquitous access to analog
  • Goal of this paper: to check what else can and

cannot be done: analog and acoustical processes

III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 3

Outline

  • Motivation
  • Our Proposal
  • Working Prototype
  • Analysis
  • Possibilities

Synthesizers, acoustical, soundscapes, mixing, effects

  • Final Remarks
  • Discussion

III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 4

Motivation

  • Digital is convenient, flexible, opens up lots of

new possibilities - “there’s an app for that”

  • But Analog has unmistakable character, will

not be replaced soon

  • And so does acoustical, in fact, easier to

understand how much

  • Collecting analog synths is difficult, expensive,

as it is renting, studio time

  • Online access in real-time is *inefficient*, like

renting, plus networking problems

III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 5

The Proposal

  • An analog system (server, farm) online, to

render the sound of a performance

  • Batched operation: users submit MIDI files

and retrieve audio sometime after

  • Initially thought as a commercial system, but

there are many options

  • Architecture: front-end, server-side, hardware

(computer, synth, MIDI, Audio)

III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 6

Architecture

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III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 7

First Working Prototype

  • Studio Electronics ATC-1, Moog-type filter
  • Recorded using a custom A/D converter
  • PHP, JavaServer for queue and MIDI filter
  • Cubase 6 Elements with key shortcuts
  • AppleScript for GUI automation (delays)
  • Check it: ask for address

III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 8

Analysis - summary

  • The main challenge: sound prediction
  • Typical usage and possibilities
  • Economics: cost estimate
  • Options for service operation: commercial,

networked, associated to plug-ins, etc…

  • Options for sound preview: samples,

calibrated plug-ins, user database…

  • Question: what other analog processes

could be operated as servers?

III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 9

Advantages

  • In the studio, most equipment is idle most of

the time. The same at home, so collecting instruments does not pay off

  • High usage (batched) leads to low cost
  • We are applying the concept of sound

rendering: plan first, render better at the end

  • As a service, instead of a cost-compromised

product, a higher quality can be attained

  • Custom recording and different sound flavors

III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 10

What is possible and what is not

  • Microphones are not an option
  • Pre-amplifiers are not an option

(as you have to feed them)

  • Guitar amplifiers? No. (they are pres)

This is a big part of a studio…

  • Effect chains are questionable (later)
  • But many things can be considered for

analog server implementation: our goal

III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 11

Sinthesizers

  • In production, MIDI-equipped analog
  • Synthesizers from the past, MIDI-equipped
  • MIDI-retrofitted
  • Controlled with MIDI-to-CV converters
  • Modified, or automated, allowing sound

programming

  • Custom instruments, special projects
  • Restored, recriated (like vacuum tube synth)

III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 12

Acoustical Instruments

  • Pianos, organs, xylophones, stringed (guitar,

bass)...

  • Sound is captured with microphones
  • Need automation (mechanical, some

electromagnetic)

  • No problem with parameter preview
  • Needs a treated room
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III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 13

Robotic Instruments

  • Pat Metheny’s

III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 14

Issues

  • Pianos, organs, xylophones, stringed (guitar,

bass)...

  • Each instrument may have a particularity
  • Ex: piano: tuning - software, hardware
  • Ex: strings: articulation, fingering?
  • Ex: electric guitar: effects path
  • There are works addressing most of these

issues

III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 15

Miking leads to… soundscapes?

  • Rain
  • Streets
  • People
  • Forest
  • Microphone movements
  • room acoustics (or is it an effect?)

III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 16

Analog Mixing

  • Analog mixing, out-of-the box summing
  • Traditionally done in a mixing console
  • Mixing consoles have sound signatures
  • Can be done
  • All tracks must be transferred
  • The automation must be transferred to the

analog domain

  • Server could remember tracks recorded on it

III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 17

Effects?

  • During recording, usually avoid effects
  • After recording, need additional D/A and A/D

conversion

  • All this is being modeled today
  • Dynamics, e.g., compression
  • Reverb, delay, all others
  • Makes more sense when mixing down

III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 18

Main Conclusion

  • This was a prospective paper
  • Motivated by a working prototype
  • It was found that many other analog / acoustic

processes can be implemented remotely as audio servers

  • There is already available technology for most
  • f them
  • Promissing possibilities arise
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III UbiMus, São Paulo 2012 - Zawacki, Johann - Analog Audio Web Servers - Slide 19

Final Remarks

  • High usage (batched) leads to low cost
  • The system opens up a lot of possibilities
  • We can keep iconic historical instruments alive
  • We can create new unique instruments
  • Will promote the knowledge and use of the
  • riginal instruments
  • Future works? Let us discuss, there are many

Questions?

Lucas Zawacki Marcelo Johann

A Prospective Analysis of Analog Audio Recording with Web Servers

The Third Workshop on Ubiquitous Music: Ubiquitous and Mobile Computing for Education and Creative Industries

T h a n k y

  • u

!

{lfzawacki,johann}@inf.ufrgs.br